/Engine/Source/Runtime/GeometryCore/Public/DynamicMesh/DynamicMeshOverlay.h
Checks that the overlay mesh is well-formed, ie all internal data structures are consistent
bool CheckValidity ( bool bAllowNonManifoldVertices, [EValidityCheckFailMode](API\Runtime\GeometryCore\UE__Geometry__EValidityCheckFail-) FailMode ) const